Year	% gross
1971	83.1561737060547
1976	84.5523910522461
1981	88.1368408203125
1982	87.7517013549805
1983	89.0207214355469
1984	89.3935470581055
1985	92.3591384887695
1986	94.786491394043
1987	95.4584274291992
1988	97.0510101318359
1989	97.9362716674805
1990	98.5304794311523
1991	98.8182373046875
1992	99.4294967651367
1993	100.169830322266
1994	101.377372741699
1995	101.77555847168
1996	102.050750732422
1997	102.113067626953
1998	94.6171188354492
1999	95.833869934082
2000	96.3779373168945
2001	96.7734069824219
2002	96.4945831298828
2003	96.9213027954102
2004	96.5513229370117
2005	97.7880630493164
2006	98.4202194213867
2007	98.1064224243164
2008	98.0029373168945
2009	98.306266784668
2010	98.2814788818359
2011	97.5853881835938
2012	98.1663970947266
2013	99.4306716918945
2014	99.4170379638672
2015	99.7147521972656
2016	99.1238174438477
2017	98.8336181640625
2018	98.9431686401367
2019	100.049346923828
2020	100.287178039551
2021	101.08470916748
2022	100.453628540039